PowerCell Series - RF/FM Broadband Power Amplifiers
PowerCell 3.5kW (PWC3kW) 3500W Broadband FM Power Amplifier
Technical Manual
Sinteck Next RF Systems - Rua dos Bolivianos 578 Vl Rio Branco Sao Paulo/SP BRASIL
Further information and Sales, please contact cs@sinteck.com - www.sinteck.com
Released
Sep - 2009
Sao Paulo
WINTER09-SRFPWC-090909A
3.5kW
leased
p - 2009
ao Paul
o
System Characteristics
P-06
Suitable as RF Power Amplifier for Mid and High Power FM
Stations from 3.500W to 55.000W and Intermediary Driver
Amplifier for XkWs Tube Stages.
The PowerCell 3.5kW is a RF Power Amplifier, suitable for FM
broadcast applications. It is broadband “no tune”, this means the RF
power level stays same independently of tuned frequency in the FM
exciter.
A powerful RF low pass filter was included in the PowerCell 3.5kW, it is
an important stage in a RF amplifier. This filter cut off all frequencies
above 110MHz. The attenuation of 2nd harmonic is better than 75dB.
The PowerCell 3.5kW has 3500W RF output power with 5-10W RF
input. You can connect the EX15 MiniStation in this amplifier and you’ll
get 3500W continuous RF power level on the output. Also, the version
PowerCell 3.5kW/LD (note: LD means “Low driving” and HD means
“High-driving” inputs) you can connect any 600mW exciter, this
version has a RF driver built-in.
The power output is adjustable from 35W, you can choose what power
you need, by pressing the buttons UP/DOWN located on the front
panel, very easy, digitaly.
A thrue RMS wattmeter was included in this version. Level of
Forwarded power and Reverse power are measured in real-time
through the LCD graphic display located at the panel of PowerCell
3.5kW. There is a mechanical cavity measuring the RF levels with high
accuracy.
The equipment is totally protected against fails: when you start the
PowerCell 3.5kW the RF power goes increasing softly, after
approximately 1 minute the total power is delivered to the load
(antenna). If the equipment find a high level of VSWR the equipment
will work in “FOLDBACK” and a message will shown on the LCD,
saying there is a problem in your antenna. High levels of current and
voltage are detected and the PowerCell 3.5kW will protect itself, not
damaging the RF stage (LDMOS transistors, using 6 x BLF574 from
NXP Semiconductors).
The equipment counts with progressive forced ventilation, this means
the internal temperature stays same independently of external
temperature, and if this external temperature is above 55ºC, the
equipment will reduce the power level until the normal temperature on
heatsink is stablished again.
The PowerCell 3.5kW is a reliable equipment, never stopping to
transmit, although in extreme conditions.
The AC input is 220V Single-phase (Three-phase available under
request) double “Switched Mode Power Supply” ZVS system, that
allows the maximum efficiency (about 95%) assuring high power
economy. Sinteck introduce the system of “Inserting Power Supply”,
where the Power Supply System is inserted and may be changed
easily.
* 3500W Continuous RF Power Out
* Broadband 87,5-
108,1MHz
* Digital Wattmeter Thrue-RMS
* Powerful Low Pass filter included
* 185-265V SMPS of high efficiency
* Totally Protected against Fails
* Remote/Interlock interface
* LDMOS DESIGN
PowerCell Series
SRFPWC-090909 REV.A
SERIES
* Progressive Forced Ventilation
PowerCell 3.5kW (PWC3kW) 3500W Broadband FM Power Amplifier
P-07
Technical Features
Output Power: 3550W +/- 5% variation across the band
RF Output Impedance: 50 Ohms
RF Output Connector: DIN 7/16 (or EIA 1 5/8)
Frequency Range: 80 to 110MHz
Harmonic and Spurious Attenuation: >75dBc or better
RF Features:
Power Supply:
AC Input:
Not available in this version
DC Input:
Bank or Varistors (285V), gas dischargers and fuses
AC Surge Protection:
93% or better in 220V AC
Power Supply Efficiency:
200kHz
Switching Frequency:
Approximately 4300W from AC (for 3500W RF output set)
Power Consumption:
Power Bridge
AC Input Connector:
General Features:
38,8kgs net weight
Weight:
483mm (6”) wide, 133,35mm (3 RU) high, 700mm (27.5”) deep
Dimensions:
0 to +45 Degrees Celsius
Ambient Temperature Range:
95% at +45ºC without condensation
Maximum Humidity:
CPU and Display Features:
PIC Processor, microcontrolled with Sinteck PWC3.5K1 Software V.1.0
CPU:
Non-volatile, retention >40 years
Memory:
VDC protection, ADC protection, TEMP excedeed, VSWR excedeed
Full Micro-controlled protections:
Selection of measured patterns, RF power Adjust
Panel Keys Control:
16 colums, 2 lines, green back light
LCD Display:
RF Input:
50 Ohms
Input Impedance:
N Female (UHF under request)
Input Connector:
*Specification subject to change without notice
5 to 10W (Standard version)
Input RF power (normal operating):
20W
Input RF power (maximum):
220V 47-63Hz +/- 25% Variation
PowerCell Series
SRFPWC-090909 REV.A
SERIES
PowerCell 3.5kW (PWC3kW) 3500W Broadband FM Power Amplifier
Technical Features (cont.)
P-08
RF Power Output x Frequency
RF Power Output x Input Power:
500W
1000W
2000W
2500W
2750W
3000W
3250W
3500W
3700W
0W
88,1 90,189,1 91,1 92,1 93,1 94,1 95,1 96,1 97,1 98,1 99,1 100,1 101,1 103,1102,1 104,1 105,1 106,1 108,1107,1
1,0W 2,0W
3,0W
4,0W 5,0W 6,0W 7,0W 8,0W 9,0W 10W 11W 12W 14W13W 15W 16W 17W 19W18W
F= 98,1MHz
20W 21W
PowerCell Series
SRFPWC-090909 REV.A
SERIES
PowerCell 3.5kW (PWC3kW) 3500W Broadband FM Power Amplifier
500W
1000W
2000W
2500W
2750W
3000W
3250W
3500W
3700W
0W
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